#!/bin/bash

# -------------------------------------------------------------------------- #
# Copyright 2002-2016, OpenNebula Project, OpenNebula Systems                #
#                                                                            #
# Licensed under the Apache License, Version 2.0 (the "License"); you may    #
# not use this file except in compliance with the License. You may obtain    #
# a copy of the License at                                                   #
#                                                                            #
# http://www.apache.org/licenses/LICENSE-2.0                                 #
#                                                                            #
# Unless required by applicable law or agreed to in writing, software        #
# distributed under the License is distributed on an "AS IS" BASIS,          #
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   #
# See the License for the specific language governing permissions and        #
# limitations under the License.                                             #
#--------------------------------------------------------------------------- #

###############################################################################
# This script is used to export an image to qcow2 file
###############################################################################

# ------------ Set up the environment to source common tools ------------

if [ -z "${ONE_LOCATION}" ]; then
    LIB_LOCATION=/usr/lib/one
else
    LIB_LOCATION=$ONE_LOCATION/lib
fi

. $LIB_LOCATION/sh/scripts_common.sh

DRIVER_PATH=$(dirname $0)
source ${DRIVER_PATH}/../libfs.sh

# -------- Get rm and datastore arguments from OpenNebula core ------------

DRV_ACTION=$1
ID=$2

XPATH="${DRIVER_PATH}/../xpath.rb -b $DRV_ACTION"

unset i XPATH_ELEMENTS

while IFS= read -r -d '' element; do
    XPATH_ELEMENTS[i++]="$element"
done < <($XPATH     /DS_DRIVER_ACTION_DATA/IMAGE/SOURCE \
                    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/BRIDGE_LIST)
unset i

SRC="${XPATH_ELEMENTS[i++]}"
BRIDGE_LIST="${XPATH_ELEMENTS[i++]}"

#-------------------------------------------------------------------------------
# Output image source and format
#-------------------------------------------------------------------------------

INFO_SCRIPT=$(cat <<EOF
CHECKSUM=\$(${MD5SUM} ${SRC} | cut -f1 -d' ')
SIZE=\$(${DU} -Lm ${SRC} | cut -f1)
FORMAT=\$(${QEMU_IMG} info ${SRC} 2>/dev/null | grep -Po '(?<=file format: )\w+')

if [ -z "\$CHECKSUM" -o -z "\$SIZE" ]; then
    exit 1
fi

echo "<MD5><![CDATA[\$CHECKSUM]]></MD5>"
echo "<SIZE><![CDATA[\$SIZE]]></SIZE>"
echo "<FORMAT><![CDATA[\${FORMAT:-unknown}]]></FORMAT>"
EOF
)

if [ -n "$BRIDGE_LIST" ]; then
    HOST=`get_destination_host $ID`
    INFO=$(ssh_monitor_and_log "$HOST" "$INFO_SCRIPT" "Image info script" 2>&1)
    SRC="ssh://$HOST:$SRC"
else
    INFO=$(monitor_and_log "$INFO_SCRIPT" "Image info script" 2>&1)
fi

INFO_STATUS=$?

if [ "$INFO_STATUS" != "0" ]; then
    echo "$INFO"
    exit $INFO_STATUS
fi

echo "<IMPORT_INFO><IMPORT_SOURCE><![CDATA[$SRC]]></IMPORT_SOURCE> \
      $INFO \
      <DISPOSE>NO</DISPOSE></IMPORT_INFO>"

